动力性是整车的重要性能指标之一 ． 为研究混合动力汽车的动力性优化问题，按照车速序列将全油门加速过程转化为多级决策过程，提出了动力性优化问题的动态规划求解方案；建立了新型功率分流混合动力汽车模型，基于 Ｍａｔｌａｂ仿真平台得到了全局最优控制策略；同时，建立了双电机转矩图，定义电机速比及动力电池功率带，分析、归纳了全油门加速控制策略．整车动力性优化试验结果显示，优化后车辆的百公里加速时间减少
了１５．７％ ，基于动态规划算法的控制策略可显著提升整车动力性．

Acceleration performance is one of the important vehicle performance indicators. To solve the optimization problem of acceleration performance, dynamic programming problem is established by transforming the full-load acceleration progress to Multi-level decision-making process according to vehicle speed. Models for the novel power-split hybrid vehicle were established and the globally optimized control strategy was obtained on Matlab platform. Dual-motor torque figure was established while motor speed ratio and battery power band were defined to analyze the control strategy. The vehicle test result of optimization for power performance showed, 0ne-hundred-kilometers acceleration time was decreased by 15.7 percent. The control strategy based on dynamic programming significantly improves the vehicle acceleration performance.